This article focuses on the sociological quantitative/qualitative dilemma form a new perspective: the complexity. The goal of this article es to provide new elements for a more flexible and creative methodology. Following this paradigm of complexity (along with other such as effective uncertainty, incompleteness, chaos, etc. . . ), it is showed a methodological orientation in order to surpass the methodological duality approach in Sociology. This methodology is understood as a Adaptative Complex System, having the complex data as the central element of it, and as mediator between theory and empireia.